Hydraulic valve



2 Sheets-Sheet l,

(No Model.)

J. W. BURDWIN,

HYDRAULIC VALVE.

(No Model.) 2 Sheetsf-Sheet 2.

J. W. BURDWIN.

HYDRAULIC VALVE.

No. 333,334. Patented Nov. 27, 1333.

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NA PETERS Phat@LihogrzphnrV Washingn. D. C.

AUNITED STATES yPnTniw-r Ormes.

JOHN W. BURDWIN, OF RAVENSWOOD, ILLINOIS.

HYDRAULIC VALVE.

SPECIFICATION forming part of Letters Patent No. 393,35?, dated November 27, 1888. Application filed May 13, 1887. i Serial No. 238,117. (No model.)

To aZZ whom lz'z may concern:

Be it known that I, JOHN W. BURDWIN, a citizen of the United States, residing at Ravenswood, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Hydraulic Valves, of which the following is a specification.

My invention relates to adupleX valve for controlling the supply of water under pressure to the operating-cylinder of a hydraulic elevator to produce the rising movement of the elevator car, cab, or platform, and the exhaust or discharge of water from said operating-cylinder to permit the descent of the car or cab.

The invention is also applicable for controlling the flow of liquids to and from other machines, comprising presses and rams which are operated by liquids under pressure.

The essential feature of my invention is the use of a valve or valves which are operated by the pressure of water or other liquids on a piston or pistons with which the said valve is combined, the pressure on the controlling-pistons being controlled by an auxiliary or pilot valve, which may be shifted directly and with small force by the operator in the elevator car or cab; and, further, by the admission of water or other liquids under pressure to act upon either side of said controlling-pistons, andthe release of the water which has acted upon the opposite side of said pistons, the auxiliary valve indirectly produces the movements of the main valves.

My invention consists in the novel construction and arrangement of the parts of my improved valve, which will be more fully hereinafter described, and pointed out in the claims.

To more fully illustrate the construction and operation of .my improved valve, reference is made to the mechanism shown in the accompanying drawings, wherein like letters of reference indicate similar parts in the several views, and in which- Figure 1 is a vertical section of the entire valve. Fig. 2 is a top plan view of the waterchest, auxiliary valve, and ports as it appears `'with the cover of the water-chest removed.

Fig. 3 is a vertical sectional view of a modilied form of a portion of my improved valve.

Referring to the drawings, it will be seen that the valve is of the duplex pattern, composed of two cylinders, A and A', for the operating-valves B and B', which are in connection with pistons E and E', which are in turn controlled by the action of an auxiliary or pilot valve, F2.

The cylinders A andA' are constructed with enlargementsor belts H2 Hil at the intersection of the inlet A2 and outlet A, and the said cylinders are further provided and fitted with a brass or other metallic lining, c?, which is perforated, as at c3, in the whole area of the belt-space in the cylinders. The valves B and B' in the operating-cylinders A and A' are constructed with water-passages a c running th rough them parallel with their travel, allowing the same water-pressure at each end of the valve and forming a balance thereby. Each plunger of these valves is made in three parts,

` d, d',and diwith leather' er other suitable packing, di, between the parts d and d', and also between the parts d' and di, the several sections being held in place by the piston-rods H and H' from the controlling-pistons E and E', the said ends passing through the valves and having shoulders d* d4at the top thereof and nuts d5 d5 resting against and confining the bottoms of said valves. The controlling-cylindersDand D' are arranged above the valve-chambers A and A', and are separated therefrom by divisional heads e4 6*, which have glands e5 e5 in connection therewith surrounding the pistonrods Hand H',said cylinders being constructed with ports e, e', e2, and e3, in a manner similar to the cylinder of a steam-engine.

Above the controlling-cylinders, and forming the top heads, F, of the same, is a waterchest, F', having an auxiliary valve, F2, seated therein, with which the ports e e' e2 e3, leading to each end of the controlling-cylinders Daud D', are in connection. The under side of the valve F2 is formed with a chamber, G, which rides over the seat F3 and connects the several ports, as above described, and for the purposes Well understood. This valve F2 is connected to a valve-rod, F4, which projects outwardly from the valve through a suitable stuffing-box, f, and is connected with the elevator cab, car, or platform by suitable means and operated therefrom. An exhaust discharge pipe, G', is centrally connected tothe seat F3,

IOO

as shown in Fig. 1, and projects outwardly from the top of the valve entire, as shown in Fig. 2. A pipe, G2, Fig. 2, also connects with the water-chest F and feeds water under pressure thereto from a suitable source.

. The operating-valvesB and B are connected at their lower portions with a Y-coiinection, O, which unites the two valves at this point and forms only one water-passage, C2, to the 1o operating-cylinder of the elevator.

The operation of my improved hydraulic valve is as follows: When the auxiliary or pilot valve l?2 stands at the center of its stroke, as shown, the two ports e and e leading into z 5 the top portions of cach of the controlling-cylinders D and Darc open and the two pistons E and E are locked4 down by water-pressure and the operating-valves B and B' are closed. By moving the auxiliary valve F2 to the right 2o the port e leading to the top ofthe cylinder D will be opened to the chamber G of the said valve F2, and thence to the exhaust or discharge pipe G. The saine movement of the auxiliary valve F2 te the right opens the port c leading to the bottoni of the controllingcyl indcr D, allowing the ilow of water under pressure below the piston E and forces the said piston to the top of the cylinder D, drawing the valve B upward, or opening the same and 3o allowing the water from the main through branch A2 and also through the Y-connection G at C to flow into the operating-cylinder of the elevator, causing the rising motion of the elevator car or cab. Moving the valve F2 back to the center opens port c from the hottoni of cylinder D to the chamberG in thesaid valve F2, and then to exhaust G and port c to top portion of cylinder D, letting water under pressure run into the said cylinder D on top 4o of the piston E, forcing said piston down and closing valve B, and thereby stopping the rising movement of the elevator ear or cab. Moving the auxiliary valve F to the left opens port e3 from top portion of cylinder D' to the exhaust G', through the chamber G and port c, to the bottom of cylinder D', opening the operating-valve B' and allowing the water in operatingcylinder of elevator to escape or discharge through the other branch of the Y- 5o connection C, and through the outlet A of cylinder A and allowing the elevator car or eab to descend.

lt will be observed that only one operatingvalve, B or B', is moved by one movement of the auxiliary or pilot valve F, the other remaining closed and held in a closed position by the pressure of water on its controllingpiston, thereby avoiding` wear on the packing prevalent in this class of machines, where both 6o plungers of the operating-valve are attached to one valve-stem and the whole moved when the elevator car or cab is moved in either drection.

lt will be understood that the whole combination of cylinders, pistons, and valves are provided with necessary packing and glands at the points there necessary to Arender the parts water-tight.

All of the movements of the valve are under the control of the operatorin the car or eab of the elevator through the medium of the aux iliary valve and its connections.

lt is obvious that slight variations might be made in the construction of the parts without departing from the nature and principle of my invention.

Having thus described my invention, l. claiml. In a hydraulic valve, the combination of two verticallyarrangcd valve cylinders, a shell or casing for said cylinders having perforations therein, a single Y-connection uniting the lower portions of said valve-cylinders, the controlling-cylinders for the valve-cylinders, arranged immediately above the same,a single water-chest arranged ou top of said controlling cylinders, a valve seat arranged within the said water-chest and having ports therein leading to the upper and lower part of the controllingcylinders, and an exhaustpipe, G', in connection therewith, as set forth, and an auxiliary valve mounted upon said seat and operating in connection with the ports and cxhaust-discharge therein, substantially as described.

2. In a hydraulic valve, the combination of the two valve-cylinders, the ingress and egress openings A2 and A, the hollow enlargements or belts H2 and H"surrounding the lower portions of said valve-cylinders, the one communicating with the ingress opening and the other with the egress-opening, the shells or casings a? in the valve-cylinders having perforations a therein and forming seats for the divisional heads c", the controlling-cylinders mounted on top of the valve-cylinders inadirect vertical line and separated therefrom by the divisional heads c, valves and pistons working in said cylinders independently of each other, the water-chest, and an auxiliary or pilot valve in said chest, substantially as described.

3. In a duplex hydraulic valve, the duplex cylinders A A and a single connecting-passage, C, the perforated plates a2, covering the inlet and outlet,the enlargements or belts H, provided in the valvecasing opposite the inlet and outlet, the perforated plates a2, covering the belts or enlargements, the cylindrical valves B B,fitting the bore of the cylinders A A' and adapted to cover or uncover the inlet and outlet, the controlling-cylinders D D' above the cylinders A A', the pistonsE E', iltted within the cylinders D D', the stems H H', connecting the pistons to the valves, and the auxiliary valve F2 to control the admission of the water to the cylinders D D to actuate the pistons, as set forth.

4. A duplex hydraulic valve, comprising the duplex valve-cylinders A A', the duplex controlling-cylinders D D', arranged above the saine, the inlet A2, the outlet A, said inlet and IIO outlet having a singe conneetingpassage, the valves BB, Iitting the bore of the cylinders A A' and adapted to cover and uncover the inlet and outlet, the pistons E E' within the cylinders D D', the stems H H', connecting the pistons E E to the valves B B', so that thelatter will move simultaneously with the former, the single Water-chest F' above the cylinders D D', the ports e e, connecting the water-chest to the top of the cylinders D D', the auxiliary valve F2 Within the Water-chest, the ports e' e2 leading from the Water-chest down to the in ner end of the cylinders D D at one side, said ports e' e2 being covered and uncovered by the pistons EE', and the exhaust-port G',combined, r 5 arranged, and operating as set forth.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in presence of two witnesses.

JOHN WV. BURDWIN.

Witnesses:

PATRICK J. REILLY, JACOB KEIL. 

